<template>
    <div class="shopcar-container">
        <div class="goods-list">

            <!-- 商品列表项区域 -->
            <div class="mui-card" v-for="(item, i) in goodslist" :key="item.id">
                <div class="mui-card-content">
                    <div class="mui-card-content-inner">
                        <mt-switch v-model="$store.getters.getGoodsSelected[item.id]" @change="selectedChanged(item.id, $store.getters.getGoodsSelected[item.id])"></mt-switch>
                        <img :src="item.img_url" alt="">
                        <div class="info">
                            <h1>{{ item.title }}</h1>
                            <p>
                                <span class="price">￥{{ item.sell_price }}</span>
                                <numberbox :initcount="$store.getters.getGoodsCount[item.id]" :id="item.id"></numberbox>
                                <!-- 如何从购物车中获取 商品的数量：
                                    1、 创建一个空对象，然后循环购物车中所有商品的数据，把当前循环这条商品的id
                                -->
                                <a href="#" @click.prevent="remove(item.id, i)">删除</a>
                                
                            </p>
                        </div>

                    </div>
                </div>
            </div>

            <div class="mui-card">
                <div class="mui-card-content">
                    <div class="mui-card-content-inner jiesuan">
                        <div class="left">
                            <p>总计（不含运费）</p>
                            <p>已勾选商品 <span class="red">{{ $store.getters.getGoodsCountAndAmount.count }}</span> 件，总价 <span class="red">￥{{ $store.getters.getGoodsCountAndAmount.amount }}</span></p>
                        </div>
                        <mt-button type="danger">去结算</mt-button>
                    </div>
                </div>
            </div>

        </div>
    </div>
</template>
<script>

import numberbox from '../subcomponends/Shopcar_numbox.vue'

export default {
    data() {
        return {
            goodslist: [], // 购物车中所有商品的列表
            states: false
        }
    },
    created() {
        this.getGoodsList();
    },
    methods: {
        getGoodsList() {
            // 1. 获取到 store 中所有商品的id，然后拼接出一个 用逗号分隔的字符串
            var idStr = [];
            this.$store.state.car.forEach(item => {
                idStr.push(item.id)
            });
            if(idStr.length <= 0){ // 如果购物车中没有商品，则直接返回，不请求接口，否则会报错
                return
            }

            // 获取购物车商品列表
            this.$http.get('api/goods/getshopcarlist/' + idStr.join(',')).then(result=>{
                if(result.body.code == 0){
                    this.goodslist = result.body.data;
                }
            })
        },
        remove(id, index) {
            // 点击删除，把商品从 store 中根据传递的 id 删除，同时，把当前组件中的 goodslist 中，对应要删除的那个商品，使用 index 来删除
            this.goodslist.splice(index,1);
            this.$store.commit('removeFormCar',  id );
        },
        selectedChanged(id, val){
            console.log(id + '----' + val)
            // 没当点击开关，把最新的开关状态同步
            this.$store.commit('updateGoodsSelected', { id, selected: !val} )
        }
    },
    components: {
        numberbox
    }
}
</script>

<style lang="less" scoped>
.shopcar-container{
    background-color: #eee;
    overflow: hidden;
    .goods-list{
        .mui-card-content-inner{
            display: flex;
            align-items: center;
        }
        img{
            width: 60px;
            height: 60px;
        }
        h1{
            font-size: 13px;
            margin-bottom: 5px;
        }
        .info{
            display: flex;
            flex-direction: column;
            justify-content: flex-between;
            margin-left: 5px;
            .price{
                color: red;
                font-weight: bold;
            }
        }
    }
    .jiesuan{
        display: flex;
        justify-content: space-between;
        align-items: center;
        .red{
            color: red;
            font-weight: bold;
            font-size: 16px;
        }
    }
}
</style>